Question
A polygon has 44 diagonals. How many sides does this
polygon have?Solution
The number of diagonals for a polygon having ‘n’ sides is given by n * (n - 3)/2. ⇒ n (n - 3)/2 = 44 ⇒ n² - 3n - 88 = 0 ⇒ (n - 11) (n + 8) = 0 ⇒ n = 11
100, 164, 740, 3044, 9444, 20320
In each of the following questions, one number in the series does not follow the pattern of the others. Identify that wrong number in the series.
18, 27, 38, 56, 66, 83
Find the wrong number in the given number series.
1600, 800, 1200, 400, 100 , 12.5
In each of the following number series, one term is wrong. Find the WRONG term.
5, 10, 19, 33, 49, 70
The following numbers form a series. Find the odd one out.
24, 36, 54, 78, 121.5, 182.25
Find the wrong number in the given number series.
204, 215, 277, 337, 416, 518164, 304, 433, 551, 658, 752
9256Â Â 6844Â Â Â 4888Â Â 3350Â Â 2152Â Â 1276
273, 204, 138, 84, 39, 3
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